Zer0's 1337 Critical Hit Targetting System

If you happen to find yourself levelling up Zero's Sniper Skill Tree while playing Borderlands 2, you'll eventually come across his GameChanger, Bore. This skill not only allows your bullets to penetrate multiple enemies at once, adding 100% damage for each sequential enemy, but also marks enemies Critical Hit spots when Zero activates Deception.

If you do activate Deception though, you'll notice that marked Critical Hit spots also have things written next to them in 3D space. Among these are things such as "1337", "OMG" and "WTF" as well as many others.

These are examples of 'internet speak' and have grown into common vocabulary of many the online forum or comments section. Due to the presence of '1337', a variation of the term 'elite', often used to describe someones skill in an online shooter, it could be argued that this is the source of the inspiration. Judging by current information, the actual placement of the writing is random.